Revert "Fix #4020: Fix duplication in output of `--hightlight`."
Revert "Fix #4020: Fix duplication in output of `--hightlight`."

uuhan/Idris-dev,kojiromike/Idris-dev,kojiromike/Idris-dev,uuhan/Idris-dev,uuhan/Idris-dev,kojiromike/Idris-dev,uuhan/Idris-dev,uuhan/Idris-dev,kojiromike/Idris-dev,kojiromike/Idris-dev,kojiromike/Idris-dev,uuhan/Idris-dev,uuhan/Idris-dev